518 Longicornia Malayana. 



Length 12 lines. 



The autonnfo of this species — so far as tlie female is 

 concerned — are much more strongly dilat(Ml than in the 

 last, and the second and third joints, altliough much 

 stouter, are scarcely nodose ; the prothorax also is shorter 

 and more rounded at the sides ; but in other essential 

 characters it is sufficiently similar to be, for the present 

 and until the other sex is known, placed in this genus. 



Imbrius. 

 Tmhriiis, Puscoo, Proc. Zool. Soc. 18GG, p. 528. 



Caput antice paulo productum, vorticalo; fronte lamel- 

 lifera, hirsuta; tuboribus antcnniferis brovibus, ap- 

 proximatis. i'o//>/ articulo ultimo conico. Oci<// pro- 

 minentes, supra valdo a]i])r()ximati. AiifenniAi 

 corpore vix longiorcs ; scapo ])arum incrassato, arti- 

 culo 3io 4to vel 5to longiori, 7-10 unilateraliter 

 dilatatis, ultimo praecedente paulo longiori. Pro- 

 thorax oblongo-ovatus, muticus, disco transversira 

 corrugato. Elijtra angustata, a])ico rotundata. I'cJes 

 breviusculi, subiuiiuales ; feitiora paulo iucrassata ; 

 tarsi articulo basali breviusculo. Vrotitvriuun sub- 

 truncatum. McsostcniiDit declive. 



My specimen of the type of this genus (1. Uneatus) is 

 a fcjnalo, but judging from the male of I. cphohns, there 

 does not a])])ear to be any diileronco between the sexes, 

 except that the antenuie of the male are a little less 

 serrate ; M. Lacordaire does not admit this genus, not 

 seeing any essential difference between it and Ih/masnis, 

 Thoms., which is unknown to me, but from his descrip- 

 tion, it appears that the posterior tarsi of the latter have 

 an elongate basal joint, or at least a joint longer than 

 the second and third together ; and the antennie have 

 the tliiril joint ecpial to the fourth and fifth taken together. 

 After this 1 cannot agree that the two genera should be 

 united. 1 think, however, that /. sfrnioxHts should be 

 removed from Imhriits, as with the posterior tarsi of the 

 present genus it has the antenna? of Dyt)i(isivs, and differs 

 from botii in its truncate elytra. The genus will then consist 

 of three homogeneous sjiecies : I have a fourth unpub- 

 lished, from Malacca ; obtained, 1 believe, from the 

 Count P. de Castelnau's collection. 



